diff --git a/TaskE00/run.py b/TaskE00/run.py
new file mode 100644
index 0000000..4b0ec6c
--- /dev/null
+++ b/TaskE00/run.py
@@ -0,0 +1,41 @@
+import re
+
+FILE_NAME = "test"
+
+MODE = "test"
+
+
+def is_correct(line: str):
+    looking_pattern = re.compile(r"^-?(0|[1-9]\d*[05])$")
+
+    if re.search(looking_pattern, line):
+        return "yes"
+    else:
+        return "no"
+
+
+if MODE == "test":
+    with open(FILE_NAME + ".in", "r", newline="", encoding="utf8") as file:
+        text = [line.rstrip() for line in file.readlines()]
+
+    with open(FILE_NAME + ".exp", "r", newline="", encoding="utf8") as file:
+        expected = [line.rstrip() for line in file.readlines()]
+
+    out: list[str] = []
+    for line in text:
+        out.append(is_correct(line))
+
+    for ind, found in enumerate(out):
+        if found == expected[ind]:
+            print(found)
+        else:
+            print("ERROR")
+
+elif MODE == "input":
+    line = input("Enter a line: ")
+
+    # Check if the line is an acronym and print 'yes' or 'no'
+    if is_correct(line) == "yes":
+        print("yes")
+    else:
+        print("no")
diff --git a/TaskE01/run.py b/TaskE01/run.py
new file mode 100644
index 0000000..df56b27
--- /dev/null
+++ b/TaskE01/run.py
@@ -0,0 +1,41 @@
+import re
+
+FILE_NAME = "test"
+
+MODE = "test"
+
+
+def is_correct(line: str):
+    looking_pattern = re.compile(r"^\d*(00|25|50|75)$")
+
+    if re.search(looking_pattern, line):
+        return "yes"
+    else:
+        return "no"
+
+
+if MODE == "test":
+    with open(FILE_NAME + ".in", "r", newline="", encoding="utf8") as file:
+        text = [line.rstrip() for line in file.readlines()]
+
+    with open(FILE_NAME + ".exp", "r", newline="", encoding="utf8") as file:
+        expected = [line.rstrip() for line in file.readlines()]
+
+    out: list[str] = []
+    for line in text:
+        out.append(is_correct(line))
+
+    for ind, found in enumerate(out):
+        if found == expected[ind]:
+            print(found)
+        else:
+            print(f"ERROR: expected - {expected[ind]}, found - {found}")
+
+elif MODE == "input":
+    line = input("Enter a line: ")
+
+    # Check if the line is an acronym and print 'yes' or 'no'
+    if is_correct(line) == "yes":
+        print("yes")
+    else:
+        print("no")
diff --git a/TaskE03/description.txt b/TaskE03/description.txt
index 411be8e..4fc9e15 100644
--- a/TaskE03/description.txt
+++ b/TaskE03/description.txt
@@ -22,7 +22,7 @@ Jeśli napis spełnia tak określony warunek, należy wypisać na
 standardowym wyjściu 'yes', w przeciwnym razie — 'no'.
 
 For each string check, if the string is NIP number written in 
-xxx-xxx-xx-xx bądź xxx-xx-xx-xxx format. You don't need to consider a checksum.
+xxx-xxx-xx-xx or xxx-xx-xx-xxx format. You don't need to consider a checksum.
 If the string fulfills the condition, you should print 'yes' on the 
 standard output and 'no' otherwise.
 
diff --git a/TaskE03/run.py b/TaskE03/run.py
new file mode 100644
index 0000000..b83d8d7
--- /dev/null
+++ b/TaskE03/run.py
@@ -0,0 +1,41 @@
+import re
+
+FILE_NAME = "test"
+
+MODE = "test"
+
+
+def is_correct(line: str):
+    looking_pattern = re.compile(r"^\d{3}-\d{3}-\d{2}-\d{2}$|^\d{3}-\d{2}-\d{2}-\d{3}$")
+
+    if re.search(looking_pattern, line):
+        return "yes"
+    else:
+        return "no"
+
+
+if MODE == "test":
+    with open(FILE_NAME + ".in", "r", newline="", encoding="utf8") as file:
+        text = [line.rstrip() for line in file.readlines()]
+
+    with open(FILE_NAME + ".exp", "r", newline="", encoding="utf8") as file:
+        expected = [line.rstrip() for line in file.readlines()]
+
+    out: list[str] = []
+    for line in text:
+        out.append(is_correct(line))
+
+    for ind, found in enumerate(out):
+        if found == expected[ind]:
+            print(found)
+        else:
+            print(f"ERROR: expected - {expected[ind]}, found - {found}")
+
+elif MODE == "input":
+    line = input("Enter a line: ")
+
+    # Check if the line is an acronym and print 'yes' or 'no'
+    if is_correct(line) == "yes":
+        print("yes")
+    else:
+        print("no")
diff --git a/TaskE04/run.py b/TaskE04/run.py
new file mode 100644
index 0000000..ffb5834
--- /dev/null
+++ b/TaskE04/run.py
@@ -0,0 +1,41 @@
+import re
+
+FILE_NAME = "test"
+
+MODE = "test"
+
+
+def is_correct(line: str):
+    looking_pattern = re.compile(r"^((555-\d{3}-\d{3})|(555 \d{3} \d{3}))$")
+
+    if re.search(looking_pattern, line):
+        return "yes"
+    else:
+        return "no"
+
+
+if MODE == "test":
+    with open(FILE_NAME + ".in", "r", newline="", encoding="utf8") as file:
+        text = [line.rstrip() for line in file.readlines()]
+
+    with open(FILE_NAME + ".exp", "r", newline="", encoding="utf8") as file:
+        expected = [line.rstrip() for line in file.readlines()]
+
+    out: list[str] = []
+    for line in text:
+        out.append(is_correct(line))
+
+    for ind, found in enumerate(out):
+        if found == expected[ind]:
+            print(found)
+        else:
+            print(f"ERROR: expected - {expected[ind]}, found - {found}")
+
+elif MODE == "input":
+    line = input("Enter a line: ")
+
+    # Check if the line is an acronym and print 'yes' or 'no'
+    if is_correct(line) == "yes":
+        print("yes")
+    else:
+        print("no")